5. When historians first examined household account books from the seventeenth century, some assumed that the records would mainly document large purchases such as livestock, tools, or land. Instead, many surviving books contain frequent entries for small items—candles, thread, soap, and modest food purchases—recorded week after week. Because these repeated expenses often totaled substantial sums over time, researchers now use the account books to study not only major investments but also the economics of everyday life.
Which choice best states what can reasonably be inferred from the text?